<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title></title>
    <script src="https://cdn.staticfile.org/vue/2.4.2/vue.min.js"></script>
</head>

<body>
    <div id="app">
        <p>{{ site }}</p>
    </div>

    <script>
        var vm = new Vue({
            el: '#app',
            data: {
                name: 'Google',
                url: 'http://www.google.com'
            },
            computed: {
                site: {
                    // getter
                    get: function () {
                        return this.name + ' ' + this.url
                    },
                    // setter
                    set: function (newValue) {
                        var names = newValue.split(' ')
                        this.name = names[0]
                        this.url = names[names.length - 1]
                    }
                }
            }
        })
        // 调用 setter， vm.name 和 vm.url 也会被对应更新
        vm.site = '菜鸟教程 http://www.runoob.com';
        document.write('name: ' + vm.name);
        document.write('<br>');
        document.write('url: ' + vm.url);
    </script>
</body>

</html>